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Port 10540 (MOS-lower)

IANA assigns port 10540 to MOS-lower: MOS Media Object Metadata Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
MOS-lower TCP MOS Media Object Metadata Port Eric Thorniley -
MOS-lower UDP MOS Media Object Metadata Port Eric Thorniley -

Registry dates for this port: registered 2007-09-17.

Check what is listening on port 10540

Linux: is anything listening on TCP 10540?
sudo ss -tlnp 'sport = :10540'
Linux: UDP 10540
sudo ss -ulnp 'sport = :10540'
Linux / macOS: which process owns the port
sudo lsof -nP -i :10540
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':10540 '
Windows (Command Prompt)
netstat -ano | findstr :10540
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 10540 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 10540
From Windows
Test-NetConnection HOST -Port 10540
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 10540

Block port 10540 in the firewall

ufw
sudo ufw deny 10540/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 10540 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 10540 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 10540' -Direction Inbound -Protocol TCP -LocalPort 10540 -Action Block
ufw
sudo ufw deny 10540/udp
iptables
sudo iptables -A INPUT -p udp --dport 10540 -j DROP
nftables
sudo nft add rule inet filter input udp dport 10540 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 10540' -Direction Inbound -Protocol UDP -LocalPort 10540 -Action Block

Related ports

10443cirrossp10500hip-nat-t10541MOS-upper10542MOS-aux

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.